<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #d1{
            width: 100px;
            height: 100px;
            border: 1px dotted red;
            border: 1px dashed red;
            border: 3px double green;

            border: 10px groove red;

            /*设置圆角，值越大越圆*/
            border-radius: 50px;
        }

        #d2{
            width: 100px;
            height:100px;
            border: 1px solid red;
            padding-left:30px;
            padding-top:30px;
        }
    </style>
</head>
<body>

<div id="d1">边框测试</div>
<div id="d2">内边距</div>
</body>
</html>